How many queries are too many?

Question

I have to run one time 10 mysql queries for one person in one page. Is it very bad? I have quite good hosting, but still, can it break or something? Thank you very much.

Answer 1

How many queries are too many?

I will rephrase your question:

Is my app fast enough?

Come up with a business definition of "fast enough" for your application (based on business/user requirements), come up with a way to model all your usage scenarios and expected load, create simulations of that load and profile (trace/time) it.

This approach amounts to an educated guess. Anything short of it is pure speculation, and worthless.

If your application is already in production, and is working well in most cases, you can get feedback from users to determine pain points. From there, you can model those pain points and corresponding load, and profile.

Document your results. Once you make improvements to your application, you have a tool to determine if the optimizations you made achieved your goals.